Hand Valve - Shut-Off Valve (On-Off 2 way, 3 way) Characteristics The Hand valve (shut-off valve) turns on and off air pressure to a pneumatic device or a circuit. The three way, pressure relief type isolates the supplied air pressure and exhausts the downstream pressure for maintenance purpose while the two way type holds the downstream pressure. 4 types are available to fit the application requirement. Construction 2-way valve Graphical representation Metalic body (nickel-plated brass) Exhaust 3-way valve Graphical representation Cap Knob (polyacetal) Spool (nickel-plated brass) Resin body (polybutylene telephthalate) Elastic sleeve (nitrile rubber) Release ring (polyacetal) Tube Lock claw (stainless steel) O-ring (nitrile rubber) Model Designation (example) Fluid admitted Service pressure range Working vacuum Service temperature range Code Size (4)Number of valve ports No code : 3-way valve -2 : 2-way valve Connection size American standard taper pipe thread Code Size (1)Model (2)Input port size (3)Output port size Connection size No code : Standard color 12 φ12 Taper pipe thread size U: Hexagon flat-to-flat inch spec. (NPT) No code: Hexagon flat-to-flat mm spec.  R thread is same as BSPT About 3-way and 2-way Valves Exhaust Close Input port Output port 3-way valve The three way valve releases the residual pressure from the downstream (connected devices) when turning off. It is necessary to protect the systems against malfunction or decrease the pressure so the systems may be maintained. The two way valve holds the pressure so it is ideal for the application where the residual pressure maintained such as an air tank or some vacuum sy

file name

 R thread is same as BSPT file name

Union Straight file name Nipple Type unit:mm Eff. area Weight unit:mm MODEL  R thread is same as BSPT file name

! Detailed Safety Instructions Before using the PISCO device, be sure to read the "Safety Instructions", "Common Safety Instructions for Products Listed in This Manual" and "Common Safety Instructions for Change Series Valves". ! Caution 1. When operating the cap lever, turn it 90 degrees completely until it stops. Inadequate turning may result in poor conduction or low flow rate due to faulty switching. 2. Distinguish between the two-directional and the three-directional control valve by checking the marking 2 or 3 on the top surface of the cap lever. 3. For use with negative pressures, provide...